A022323 - OEIS

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A022323

a(n)=a(n-1)+a(n-2)+1.

1, 9, 11, 21, 33, 55, 89, 145, 235, 381, 617, 999, 1617, 2617, 4235, 6853, 11089, 17943, 29033, 46977, 76011, 122989, 199001, 321991, 520993, 842985, 1363979, 2206965, 3570945, 5777911, 9348857 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (2,0,-1).`
	FORMULA	`G.f. ( 1+7x-7x^2 ) / ( (x-1)*(x^2+x-1) ). a(n) = A022367(n)-1. - R. J. Mathar, Apr 07 2011`
	CROSSREFS	`Sequence in context: A195572 A046259 A074345 * A106525 A103510 A130730` `Adjacent sequences: A022320 A022321 A022322 * A022324 A022325 A022326`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 09:30 EST 2012. Contains 206009 sequences.